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Note 2 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Credit Losses for Financing Receivables, Current [Table Text Block] |
|  | Year Ended December 31, |
|  | 2016 |  |  | 2015 |
Allowance for doubtful accounts-beginning of year |  | $ | 1,474 |  |  | $ | 2,170 |
Net recovery of bad debt reserve |  |  | (314 | ) |  |  | (433 | )
Write-off |  |  | (888 | ) |  |  | (263 | )
Allowance for doubtful accounts-end of year |  | $ | 272 |  |  | $ | 1,474 |

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- Definition Tabular disclosure of credit losses for current financing receivables (such as trade and accounts receivable), including a rollforward of the balance. An alternative caption includes allowance for doubtful accounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
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